Bacterial proteins were radioactively labeled and fed to phagocytic cells. The proteins within the phagocytic cell became increasingly more radioactive over time. This observation is the result of the activity of
A) mitochondria.
B) chloroplasts.
C) lysosomes.
D) peroxisomes.
E) the Golgi apparatus.
C) lysosomes.
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What statement best summarizes the nature of scientific inquiry? a. Explanations about nature must be testable in ways that others can repeat
b. Once experimentally verified, scientific hypothesis becomes scientific fact. c. Moral, philosophical, and ethical values will eventually be replaced by rational explanations. d. Personal experience, insight, and revelation are as valid as experimental data.
Genes that regulate development of specific body parts are called ________ genes
a. induction b. somite c. homeotic d. morphogen
What is the cell wall's function in the cell?
a. physically protect and support b. identify potentially harmful molecules outside the cell c. prevent water from leaving the cell d. enclose the cell in a polar envelope
One sarcomere
A. extends from Z line to Z line. B. is composed of many muscle fibers. C. is composed of many myofibrils. D. contains only actin fibers. E. surrounds each muscle in the body.